2557603078 has 4 divisors (see below), whose sum is σ = 3836404620. Its totient is φ = 1278801538.

The previous prime is 2557603051. The next prime is 2557603093. The reversal of 2557603078 is 8703067552.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639400768 + ... + 639400771.

It is an arithmetic number, because the mean of its divisors is an integer number (959101155).

Almost surely, 2^2557603078 is an apocalyptic number.

2557603078 is a deficient number, since it is larger than the sum of its proper divisors (1278801542).

2557603078 is a wasteful number, since it uses less digits than its factorization.

2557603078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278801541.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 2557603078 is about 50572.7503503616. The cubic root of 2557603078 is about 1367.5536782969.

The spelling of 2557603078 in words is "two billion, five hundred fifty-seven million, six hundred three thousand, seventy-eight".